- The prologue of The Rules of Survival is basically presented as a letter from the narrator, Matthew, to his younger sister Emmy. Emmy is now nine-years-old, and he wants to write down their family story so that she can read it and weep someday.
- He just wants her to know everything that went down with their family, and especially how the three siblings—Matthew, Callie, and Emmy—ended up where they are today. This sounds like it's going to be a pretty heavy letter.